Pump mounting



SeptT 6,' 1949. D. sHERwoQD y 2,481,452

PUMP MOUNTING Fil-ed om. 14, 1948 nventor (Iftornegs Patented Sept. 6, 1949 PUMP MOUNTING David Sherwood, Detroit, Mich., assigner to Sherwood Brass Works, Detroit, Mich., a corporation of Michigan Application October 14, 1948, Serlnl No. 54,460

12 claims. 1

This invention relates to pumps, and in particular to mountngs for pumps.

One object of this invention is to provide an improved pump mounting wherein the weight of the pump is supported by the same shaft which drives the pump, such as, for example, the power take-off shaft of a tractor.

Another object is to provide an improved pump mounting including a coupling forming a unitary part of the pump assembly and not only driving the pump but also supporting it when the coupling is connected to a power shaft, without the necessity of providing other parts which might become detached and lost,

Another object is to provide an improved pump mounting of the foregoing character, wherein the pump and its mounting may instantly be attached to or detached from the power shaft by which it is driven and supported.

In the drawings:

Figure 1 is a central vertical section through a pump equipped With the combined mounting and drive coupling of the present invention; and

Figure 2 is a left-hand end elevation of the pump shown in Figure 1, with the casing partly broken away to disclose the internal construction.

Hitherto, in pumps which have been supplied for connection to the power take-off shaft of a tractor or other vehicle, it has been necessary not only to buy the pump but also to provide a mounting by which the pump may be supported on the tractor. Since various makes of tractors differ in their construction, it has been necessary, hitherto, for the buyer to buy not only a separate drive coupling and attach it to the pump and tractor power take-off shaft respectively, but he has also been obliged to provide a suitable support for the pump itself, these supports depending upon the particular tractor under consideration. Such pumps are frequently used by agriculturists for spraying trees and shrubbery to kill insects and fungi.

The present invention eliminates the necessity for providing separate couplings and supports for the pump by building the coupling into the pump itself and by causing the coupling to support the weight of the pump. No other support is necessary other than an external connection or anchor member to prevent rotation of the pump bodily when its input shaft is rotated.

Referring to the drawings in detail, Figures 1 and 2 show a pump, generally designated I0, having a coupling device, generally designated II,

which serves as a combined mounting and power connection in the manner described below. The

pump III consists of a hollow casing I2 having a chamber I3 therein closed at its opposite sides by end plates I4 and I5 bolted or otherwise secured thereto, as at I6. The end plates I4 and I5 are provided with hollow bosses I1, I8 and I9 respectively containing bearing bushings 20 for the rotational support of parallel shafts 2| and 22 upon which are mounted inter-meshing pump gears 23 and 24- respectively. The gears 23 and 24 are keyed as at 25 to their respective shafts and rotate in partially cylindrical sub-chambers or pockets 28 and 21 respectively. Passageways 28 and 29 lead into and out of the chambers I3 and form intake and exhaust passageways terminating in ports 30 and 3I preferably threaded to receive the intake and discharge pipes respec-A tively (not shown).

The hub of the gear 24 is provided with a counterbore 32 (Figure 1) adapted to receive a conventional resilient sealing device, generally designated 33, the details of which form no part of the invention. The sealing device 33 has a contact ring 34 connected to a collar 35 which is urged to the left by a coil spring 36' into contact with a collar 31 seated in an opening 38 in the end plate I5 and having a conventional packing 39 arranged therebetween (Figure l). A resilient sleeve k4I) of rubber or synthetic rubber is clamped to the shaft 22 by the clamping ring 4I and is bonded to the contact ring 34. As a consequence, when the shaft 22 is rotated, the contact ring 34 by reason of its engagement with the collar 31 through the action of the coil spring 36 prevents leakage and loss of liquid from the chamber I3,v

The end plate l5 is also provided with a hollow cylindrical boss 42 having a bore 43 coaxial with the shaft 22 and serving to receive the outer r'ace 44 lof an anti-friction bearing unit,l generally designated 45. The inner race 46 cooperates with the outer race 44 to rotatably support an annular arrangement of anti-friction bearing balls or rollers 41. The anti-friction bearing unit 45 is likewise conventional and its details form no part of the invention. It is held in position by snap rings 48 and 49, the cylindrical boss 42 being grooved to receive the snap ring or retaining ring 48. The inner race 46, on the other hand, is mounted upon a tubular hub or neck 50 which is keyed as at 5I to the shaft 22. The neck 50 forms an extension of a hollow cylindrical coupling 52 having a bore or socket 53 for receiving the end of the power take-off shaft of the tractor or other source of power (not shown).

The neck 50 is grooved to receive the retaining ring 43. The coupling 52 is provided with a hole I4 for receiving a driving key Il held in position by the pin 55a, diametrically opposite which `is a threaded hole B adapted to receive a screw plug I1. In order to prevent bodily rotation ofthe pump I0, when the shaft 22 is rotated bythe coupling 52, the end plate I5 is provided with a stabilizing or anchoring device consisting l0f a boss 58 having a socket. adapted to'receive an anchoring rod (not shown) engaging another part of the tractor and held in position by a set screw l0 threaded into a threaded hole 6I. The bottom of the pump casing l2- is also provided witha second boss 62 having a bore 63 and cross bore 6I either of which may be used to receive an anchoring rod instead of the socket 59, in order to adapt `the pump to different makes of tractor or to dinerent installation conditions.` A set screw 65 threaded into a threaded hole 66 `serves as a clamping screw for the anchoring rod.

In the installation of the invention, the socket or bore B3 of the coupling- 52 is slipped'over the power take-off shaft of the tractor (not shown) and clamped in position by the driving key 55 and screwplug 51. The anchoring rod (not shown) is then clamped into one of the bores 59,'63 or 64 and the pump is ready to operate when the ports l. and 3| have been connected to liquid intake and discharge pipes.

In the operation of the invention, the rotation of the coupling 62 in response to the rotation of the power take-ofi' shaft (not shown) causes `the shaft 22to rotate and with it the gears 23 and 24 and the shaft 2|. At the same time, however, the weight of the pump I0 is borne by the antil2 so that no other supportis necessary for the pump I0. In this manner, the pump is supported by the same coupling by which it is driven, thereengageable with said power output shaft.-

4. A combined driving and supporting device for detachably securing to a power output shaft a pump havinga casing with a rotor shaft and a a rotor driven thereby, said device comprising a bearing housing connected to said pump'casing by. simplifying the design and increasing its versatility of adaptation to different tractors.

What I claim is: I 1. A combined driving and supporting device for detachably securing to a power output shaft a pump having a casing with a rotor shaft and a rotor driven thereby, said device comprising a bearing housing connected to said pump casing and encircling said rotor shaft, a bearing mounted in said bearing housing, and a tubular coupling drivingly connected to said rotor shaft and `iournaled in said bearing, said coupling having a portion drivingly engageable With'said power-output shaft. i i

, 2..A combined driving and supporting'device for detachably securing to a power output shaft la. pump having a casing with a rotoi` shaft and a rotor driven thereby, said device comprising ,a bearing housing connected to said pump casing and encircling said rotor shaft, a vbearing mounted in said bearing housing, a tubular coupling drivingly connected to said rotor shaft and journaled in said bearing, said coupling having a portion drivingly engageable with said power output shaft, and an anchoring'portion on said pump casing adapted to receive a stationary anchoring element whereby to pervent bodily rotation of said pump.

3. .A- combined driving and supporting device for detachably securing to a power output shaft a pump having a casingwith a rotor shaft and a rotor driven thereby, said device comprising a bearing housing connected to said pump casing and encircling said rotor shaft, a bearing mounted in said bearing housing, a tubular coupling having a bored portion receiving and drivingly connected to said rotor shaft and journaled in said and encircling said rotor shaft, a bearing mounted in said bearing housing, and a tubular coupling having a bored portion receiving and drivingly connected to said rotor'shaft and .iournaled in said bearing, said coupling having a second bored portion drivingly engageable with said power output shaft.v 5. A combined 'driving and supporting devi for detachably securing to a power output shaft a lpump having a casing with a rotor shaft and a rotor driven thereby, said device comprising a bearing housing connected to said pump casing and encircling said rotor shaft, a bearing mounted in said bearing housing, a tubular coupling'having a bore portion receiving and drivingly connected to said rotor shaft and journaled in said bearing, saidcoupling having a portion drivingly engageable with said power output shaft, and an anchoring portion on said pump casing adapted to receive a stationary anchoring element whereby to prevent bodily rotation of said pump. 6. A combined driving andsupporting device for detachably securing to a power'output shaft a pump having a casing with a rotor shaft and a rotor driven thereby, said device comprising a bearing housing connected to said pump casing and encircling said rotor shaft, a bearing mounted friction bearing unit l5 and the cylindrical boss .lo in Said bearing housing atubull couplmhvng a bored portion receiving and drivingly connected to said rotor shaft and joumaled in said bearing,v

said coupling having a second bored portion drivingly engageable with said power output shaft, and an anchoring portion on said pump casing adapted to receive a stationary anchoring element whereby to prevent bodily rotation of said pump.

7. A combined driving and supporting device for detachably 'securing to a power output shaft output shaft.

8. Al combined driving and supporting device for detachably securing to a power output shaft a 'pump having a casing with a rotor shaft and a rotor driven thereby, said device comprising a bearing housing connected to said pump casing and encircling said rotor shaft, an anti-friction bearing having its outer race mounted in said bearing housing, and a tubular coupling drivingly connected to said rotor shaft and mounted in the inner lrace of said bearing, said coupling having a portiondrivingly engageablewith said power output shaft, said coupling having a pair of co-axial bores drivingly receivingr said rotor shaft and said power output shaft respectively.

9. A combined driving and supporting device for detachably securing to a power output shaft a pump having a casing with a rotor shaft and a rotor driven thereby, said device comprising a bearing housing connected to said pump casing bearing having its'outer race 'mounted in said bearing housing, a tubular coupling drivingly connected to said rotor shaft and mounted in the inv ner race of said bearing, said coupling having lpump casing adapted to receive a stationary anchoring element whereby to prevent bodily rotation of said-pump.

10. A combined driving and supporting device for detachably securing to a power output shaft a pump having a casing with a rotor shaft and a rotor driven thereby, said device comprising a bearing housing connected to said pump casing and encircling said rotor shaft, an anti-friction bearing having its outer race mounted in said bearing housing, a tubular coupling drivingly connected to said rotor shaft and mounted in the inner race of said bearing, said coupling having a portion drivingly' engageable with saidv power output shaft, said coupling having a pair of co-axial bores drivingly receiving said rotor shaft and said power output shaft respectively, and an anchoring portion on said pump casing adapted to receive a stationary anchoring element whereby to prevent bodily rotation of said pump.

11. A combined driving and vsupporting device for detachably securing to a power output shaft a pump having a casing with a rotor shaft and a rotor driven thereby, said device comprising a closure member for said casing having a bearing housing thereinencircling said rotor shaft, an anti-friction bearing mounted in said bearing housing, and a tubular coupling drivingly connected to said rotor shaft and journaled in said bearing, said coupling having a portion drivingly 'engageable with said power output shaft.

12. A combined driving and supporting'device for detachabiy securing to a power output shaft a pump having a casing with a rotor shaft and a rotor driven thereby. said device comprising a closure member for said casing having a bearing housing therein encircling said rotor shaft, an anti-friction bearing mounted in said bearing housing, av tubular coupling drivingly connected to said rotor shaft and journaled in said bearing, said coupling having a portion drivingly engageable with said power output shaft, and an anchoring portion on said pump casing adapted to receive a stationary anchoring element whereby to prevent bodily rotation of said pump.

DAVID SHERWOOD.

No references cited. 

